Recently I put up some photos of two spiders either fighting or possibly mating. I found a spider specialist who was able to answer the question and I have added some of his information and am reposting the photos. Very interesting, but remember I like photographing spiders but do not like spiders.
‘Well, sort of a fight, a type of fight that is about as old as life. You have captured mating of a male and female grass funnelweb spider (Family Agelenidae – I’m pretty sure these are specimens of Agelenopsis potteri, based on the conformation of the spiral piece on the male’s pedipalps, the antennae-like structures at the front of the spider clearly visible in images 4-6, which the male uses to transfer sperm to the female). The “blob” in the second image (and the last three) is an indication that mating and sperm transfer is in progress in that image.’